Vehicle-spring.



K. W. HAMMER & c. LCRIST.

VEHICLE SPRING. APPLICATION FILED HAYS, 190a.

Patented July 26, 1910.

'rnents in Vehicle-Springs; and we UNITED STATES PATENT OFFICE.

KARL Vi. HAMMER AND CHARLES L. CRIST, 0F DAYTON, OHIO.

VEHICLE-SPRING.

To all whom it may concern:

Be it known that we, KAnL W. HAMMER and CHARLES L. Cnrs'r, citizens ofthe United States, residing at Dayton, in the county of Mont omery andState of Ohio, have in vent certain new and useful 'Im roveo declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and usethe same, refcrence being had to the accompanying drawninggear of automo iles, and the object of the invention is to provide forthe attachment of the assembled leaves of such springs in a manner whichwill preserve the life of .the spring and will not endanger thebreakingof the same. y

In" the present improierinnt s, the leaves of the spring arestrengthened at the central point by increasing their width by providingextensions from the opposite edges of the leaves at a central oint,sothat when the leaves are assemble one on top of the other, there are aseries of lugs centrally disposed on opposite sides of the sprin s as awhole. These lugs add 'to the strengili of the spring at such point andcoiiperate with other means in the form of a band which encircles thecentral point of the assembled leaves, in preventin the individualleaves from having any in ependent lateral or longitudinal movement, allas will hereinafter more fully appear from, the specification and theaccompanying drawings forming a part thereof.

- In the accompanyingdrawings, Figure 1, is a yiew of the s ring s pwinone form of clam band or uniting t e individual spring eaves. Fig. 2, isa view of one of the leaves removed from the assembled leaves in Fig. 1.Fig. 3, is a view of the inclosing band or clamp removedfrom Fig. 1..Fig. 4, is a lan view of the band or clamp shown in igs. l and 3,before the Specification of Letters Patent. Patented July 26, 1910.

Application filed May 3, 1909. Serial No. 493,553.

same is united to the assemblage of leaves. Fig. 5, is a plan view ofthe band or clamp shown in Fig. 6. Fig. 6, is a view similar to Fig. 1showing a modification in the useof the band or clamp in uniting theindividual leaves to form the spring. Fig. 7, is a cross sectional viewof Fig. 6'-0n one side of the surrounding band or clamp. Fig. 8, is aside view of a semi-elliptic or lower half of an elliptic spring, theleaves of which are united by the method or means shown in Figs. 6 and7.

I In the detailed description of the invention, similar referencecharacters indicate corresponding parts. I

The individual leaves l which when assembled, constitute a semi-ellipticspring, are rovided as shown in Figs. 1 and 2 of the rawings, withlateral extensions or lugs 5 centrally disposed on the opposite edgesthereof, which when the leaves are assembled, are in alinement with eachother and thus provide a series of lugs extendin throu hout the depth ofthe s rin on eac 1 side ,t ereof and at the contra point of the assemblae. At the points, where these In S extend, the leaves are strengthenedby ma ing them wider at such points. The vertical shoulders thus formedatthe ends of the extensions or lugs? are en aged by the inclosing bandor clamp 3 w iich is provided with two openings 6 which receive theextensions or In s 5 w on the band or clamp is made to inc ose theassembled leaves as in Fig. l. The clamp 3 is extended around theassembled leaves and is overlapped at its Y ends and united by arivet asat 4. There is thus formed between the vertical sides of the clamp andthe lugs 5 on each side of the spring, connection which 'revents anyindependent lon itudinal or ateral movement of the in ividual leavesconstituting the spring as a whole, and said spring is secu'rel held. Adifferent connection may be ma e between the shoulders formed by thelugs 5 and the clamp, for example, in Fig. 5, the clamp is shown to havetwo lateral extensions 6' rojecting from the op osite edges thereog:which, when the clamp lIiClOSCS the assembled spring, are bent aroundtheshoulders formed by the extensions or lugs 5. This idea of means is moreclearly shown in Figs. 6 and 7, where it will be seen the lips orextensions 6' reach around the shoulders of the lugs 5 and thus lock theWVe claim:

same manner as hereinbefore described.

A semi-elli tical spring, eomprising an as semblage of e of which 1s psion on opposite edges of the central portion thereof, which increasethe width of the spring at its center and thereby strengthen the same,and provide two vertical shoulders on each side of the springi and aclamping band surrounding the $511 aves of varying lengths, each rovidedwith a single extenspring and interlocking with said shoulders torigidly bind the leaves together and lateral or Ion itudinal movemedividual mem ers of the sprin prevent any nt of the in- 15 In testimonywhereof we afi x our signatures, in pr'esenceof two witnesses.

KARL W. HAMMER.

C. M. THEOBALD.

CHARLES L. CRIST.

